Chie-Min Christopher Koo
Insider
First SEC filing: July 25, 2017 · Latest: July 25, 2017
Insider at
Insider transactions
0 buys (P)
0 sells (S)
Net: $0
Price change vs current quote, split-adjusted for corporate actions since the filing — not benchmarked, not annualized, not size-weighted
| Date | Ticker | Code | Shares | Price | Value | Owned after | Δ own | A/D | vs now |
|---|---|---|---|---|---|---|---|---|---|
| June 9, 2023 | RBB | M | 600 | · | · | 41,628 Direct | +1.46% | Acquired | (price as of 2026-10-02) |
| June 9, 2023 | RBB | M | 600 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-02) |
| Jan. 19, 2023 | RBB | M | 500 | · | · | 41,028 Direct | +1.23% | Acquired | (price as of 2026-10-02) |
| Jan. 19, 2023 | RBB | M | 500 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-02) |
| Jan. 19, 2023 | RBB | M | 600 | · | · | 41,128 Direct | +1.48% | Acquired | (price as of 2026-10-02) |
| Jan. 19, 2023 | RBB | M | 500 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-02) |
| Jan. 18, 2023 | RBB | M | 600 | · | · | 40,528 Direct | +1.50% | Acquired | (price as of 2026-10-02) |
| Jan. 18, 2023 | RBB | M | 600 | · | · | 600 Direct | -50.00% | Disposed | (price as of 2026-10-02) |
| Jan. 18, 2023 | RBB | M | 600 | · | · | 40,528 Direct | +1.50% | Acquired | (price as of 2026-10-02) |
| Jan. 18, 2023 | RBB | M | 600 | · | · | 600 Direct | -50.00% | Disposed | (price as of 2026-10-02) |
| July 21, 2022 | RBB | M | 600 | · | · | 39,928 Direct | +1.53% | Acquired | (price as of 2026-10-02) |
| July 21, 2022 | RBB | M | 600 | · | · | 500 Direct | -54.55% | Disposed | (price as of 2026-10-02) |
| April 26, 2022 | RBB | M | 10,763 | $11.15 | $120,007 | 39,328 Direct | +37.68% | Acquired | 134.9% (price as of 2026-10-02) |
| April 26, 2022 | RBB | M | 10,763 | $11.15 | $120,007 | 41,013 Direct | -20.79% | Disposed | 134.9% (price as of 2026-10-02) |
| April 26, 2022 | RBB | M | 10,763 | $11.15 | $120,007 | 0 Direct | -100.00% | Disposed | 134.9% (price as of 2026-10-02) |
| March 12, 2021 | RBB | M | 10,763 | $9.29 | $99,988 | 51,776 Direct | -17.21% | Disposed | 181.9% (price as of 2026-10-02) |
| March 12, 2021 | RBB | M | 10,763 | $9.29 | $99,988 | 28,565 Direct | +60.46% | Acquired | 181.9% (price as of 2026-10-02) |
| March 12, 2021 | RBB | M | 10,763 | $9.29 | $99,988 | 10,763 Direct | -50.00% | Disposed | 181.9% (price as of 2026-10-02) |
| Aug. 10, 2020 | RBB | S | 300 | $13.70 | $4,110 | 17,802 Direct | -1.66% | Disposed | 91.2% (price as of 2026-10-02) |
| Aug. 10, 2020 | RBB | S | 300 | $13.40 | $4,020 | 18,102 Direct | -1.63% | Disposed | 95.4% (price as of 2026-10-02) |
| Aug. 7, 2020 | RBB | S | 300 | $13.34 | $4,002 | 18,402 Direct | -1.60% | Disposed | 96.3% (price as of 2026-10-02) |
| Aug. 7, 2020 | RBB | S | 300 | $13.30 | $3,990 | 18,702 Direct | -1.58% | Disposed | 96.9% (price as of 2026-10-02) |
| Aug. 7, 2020 | RBB | S | 300 | $13.30 | $3,990 | 19,002 Direct | -1.55% | Disposed | 96.9% (price as of 2026-10-02) |
| Aug. 7, 2020 | RBB | S | 200 | $13.00 | $2,600 | 19,302 Direct | -1.03% | Disposed | 101.5% (price as of 2026-10-02) |
| Aug. 6, 2020 | RBB | S | 300 | $12.82 | $3,846 | 19,502 Direct | -1.51% | Disposed | 104.3% (price as of 2026-10-02) |
| Aug. 6, 2020 | RBB | S | 300 | $12.82 | $3,846 | 19,502 Direct | -1.51% | Disposed | 104.3% (price as of 2026-10-02) |
| Aug. 5, 2020 | RBB | S | 200 | $12.86 | $2,572 | 19,802 Direct | -1.00% | Disposed | 103.7% (price as of 2026-10-02) |
| Aug. 5, 2020 | RBB | S | 100 | $12.85 | $1,285 | 20,002 Direct | -0.50% | Disposed | 103.8% (price as of 2026-10-02) |
| Nov. 27, 2019 | RBB | S | 100 | $20.34 | $2,034 | 20,102 Direct | -0.50% | Disposed | 28.8% (price as of 2026-10-02) |
| Nov. 27, 2019 | RBB | S | 200 | $20.33 | $4,066 | 20,202 Direct | -0.98% | Disposed | 28.8% (price as of 2026-10-02) |
| Nov. 27, 2019 | RBB | S | 100 | $20.33 | $2,033 | 20,402 Direct | -0.49% | Disposed | 28.8% (price as of 2026-10-02) |
| Nov. 27, 2019 | RBB | S | 100 | $20.33 | $2,033 | 20,502 Direct | -0.49% | Disposed | 28.8% (price as of 2026-10-02) |
| Nov. 11, 2019 | RBB | S | 99 | $20.58 | $2,037 | 20,602 Direct | -0.48% | Disposed | 27.3% (price as of 2026-10-02) |
| Nov. 8, 2019 | RBB | S | 401 | $20.85 | $8,361 | 20,701 Direct | -1.90% | Disposed | 25.6% (price as of 2026-10-02) |
| Nov. 8, 2019 | RBB | S | 500 | $20.78 | $10,390 | 21,102 Direct | -2.31% | Disposed | 26.0% (price as of 2026-10-02) |
| Feb. 19, 2019 | RBB | S | 200 | $21.00 | $4,200 | 21,602 Direct | -0.92% | Disposed | 24.7% (price as of 2026-10-02) |
| Feb. 15, 2019 | RBB | S | 200 | $20.50 | $4,100 | 21,802 Direct | -0.91% | Disposed | 27.8% (price as of 2026-10-02) |
| Feb. 14, 2019 | RBB | S | 200 | $20.00 | $4,000 | 22,002 Direct | -0.90% | Disposed | 31.0% (price as of 2026-10-02) |
| Feb. 11, 2019 | RBB | S | 200 | $19.60 | $3,920 | 22,202 Direct | -0.89% | Disposed | 33.6% (price as of 2026-10-02) |
| Feb. 4, 2019 | RBB | S | 200 | $19.30 | $3,860 | 22,402 Direct | -0.88% | Disposed | 35.7% (price as of 2026-10-02) |
| April 27, 2018 | RBB | M | 10,763 | $9.29 | $99,988 | 0 Direct | -100.00% | Disposed | 181.9% (price as of 2026-10-02) |
| April 27, 2018 | RBB | M | 10,763 | $9.29 | $99,988 | 62,539 Direct | -14.68% | Disposed | 181.9% (price as of 2026-10-02) |
| April 27, 2018 | RBB | M | 10,763 | $9.29 | $99,988 | 22,602 Direct | +90.91% | Acquired | 181.9% (price as of 2026-10-02) |
P = Open-market purchase · S = Sale · A = Grant/award · M = Option exercise · G = Gift · F = Tax withholding
Insider transactions are not a recommendation; sales are often driven by liquidity or tax reasons.
Derivative holdings (Form 4 Table II) Options, RSUs and convertible securities reported on Form 4 Table II.
| Date | Ticker | Security | Underlying | Exercise price | Expiration | Shares | A/D |
|---|---|---|---|---|---|---|---|
| June 9, 2023 | RBB | Restricted Stock Units | Restricted Stock Units | $0.00 | · | 600 | Disposed |
| Jan. 19, 2023 | RBB | Restricted Stock Units | Restricted Stock Units | $0.00 | · | 500 | Disposed |
| Jan. 19, 2023 | RBB | Restricted Stock Units | Restricted Stock Units | $0.00 | · | 500 | Disposed |
| Jan. 18, 2023 | RBB | Restricted Stock Units | Restricted Stock Units | $0.00 | · | 600 | Disposed |
| Jan. 18, 2023 | RBB | Restricted Stock Units | Restricted Stock Units | $0.00 | · | 600 | Disposed |
| July 21, 2022 | RBB | Restricted Stock Units | Restricted Stock Units | $0.00 | · | 600 | Disposed |
| April 26, 2022 | RBB | Option (right to buy) | Common Stock | $11.15 | May 16, 2022 | 10,763 | Disposed |
| March 12, 2021 | RBB | Option (right to buy) | Common Stock | $9.29 | May 18, 2021 | 10,763 | Disposed |
| April 27, 2018 | RBB | Option (right to buy) | Common Stock | $9.29 | Jan. 2, 2019 | 10,763 | Disposed |
Exercise/conversion price is blank when not applicable (e.g. RSUs).
Initial ownership (Form 3) 8 holdings
Securities held when first becoming an insider, per SEC Form 3.
| Date | Ticker | Security | Shares | Ownership |
|---|---|---|---|---|
| July 25, 2017 | RBB | Common Stock, No Par Value | 11,839 | Direct |
| July 25, 2017 | RBB | Option (right to buy) | 10,763 | Direct |
| July 25, 2017 | RBB | Option (right to buy) | 10,763 | Direct |
| July 25, 2017 | RBB | Option (right to buy) | 10,763 | Direct |
| July 25, 2017 | RBB | Option (right to buy) | 10,763 | Direct |
| July 25, 2017 | RBB | Option (right to buy) | 10,250 | Direct |
| July 25, 2017 | RBB | Option (right to buy) | 10,000 | Direct |
| July 25, 2017 | RBB | Option (right to buy) | 10,000 | Direct |